Application of Planetary Vacuum Defoaming Mixer in Ink and Paint Industry

Dispersion Challenges

• Nano pigments/fillers prone to agglomeration: Such as carbon black and titanium dioxide, causing color difference, uneven gloss or reduced conductivity (conductive ink resistance fluctuation >10%).
• Dead zones in high viscosity systems: For example, thixotropic epoxy paint with traditional stirring has dispersion fineness >20 μm, affecting coating adhesion (ASTM D4541 test peel strength <5 MPa).

Bubble Residue

Solvent volatilization or mechanical stirring introduces microbubbles (10~100 μm in diameter), causing coating pinholes, shrinkage cavities or printing line breaks, with rework rates as high as 8%~15%.

Efficiency and Environmental Protection

Traditional processes require step-by-step mixing and defoaming, with long production cycles (>6 hours per batch) and excessive VOC emissions (e.g. toluene concentration >50 ppm).

1. Integrated Bladeless Mixer Technology: Blade-free High Shear Dispersion

Principle: The planetary gear system drives the container to rotate (1~50 rpm) and the stirring paddle to rotate (50~150 rpm), forming a three-dimensional spiral flow field to replace the linear shear of traditional paddles.

Advantages:

• Zero dead angle mixing: The blade-free structure prevents high-viscosity materials (such as 500,000 cps UV glue) from accumulating on the tank wall, improving dispersion uniformity to 99.5% (laser particle size analyzer detects D90≤5 μm).
• Low shear damage: Bladeless design reduces breakage of brittle materials (such as glass beads and cellulose fibers), maintaining the integrity of functional fillers.

2. Integrated Centrifuge Mixer Technology: Centrifugal Force Enhanced Dispersion

Principle: In a vacuum environment, centrifugal force (acceleration up to 2~5G) is used to throw materials toward the tank wall to achieve dynamic layering and remixing.

Advantages:

• Nano-level dispersion: Centrifugal force overcomes van der Waals forces, enabling stable suspension of nanoparticles (such as graphene and quantum dots), with conductive ink resistivity fluctuation <2%.
• Efficient defoaming: Bubbles gather toward the axis under centrifugal force, combined with vacuum suction (vacuum degree ≤-0.095 MPa), reducing defoaming time to 30 minutes (traditional static defoaming requires 4~8 hours).

3. Vacuum-Temperature Control Synergistic Process

• Precise defoaming: The vacuum system enables adjustable gradient defoaming (e.g. stepwise pressure reduction to -0.08 MPa→-0.1 MPa), avoiding surface skinning of high-viscosity materials.
• Temperature control: Jacket heating/cooling (temperature control accuracy ±1°C), suitable for low-temperature solvent-based coatings (such as -10°C chlorinated rubber paint) or high-temperature reaction systems (such as 80°C epoxy curing).

Case 1: A PCB Ink Manufacturer

Pain point: Uneven resistance of silver conductive ink (fluctuation ±12%), causing circuit impedance to exceed standards.

Solution: Using planetary vacuum defoamer, Bladeless Mixer achieves silver powder dispersion D50=1.2 μm, resistance fluctuation <±2%, reducing customer complaint rate by 90%.

Case 2: Ship Anticorrosive Coating Upgrade

Pain point: Zinc powder sedimentation after traditional stirring, coating salt spray test only 500 hours.

Result: Centrifugal force mixing ensures uniform zinc powder distribution, improving salt spray corrosion resistance to 2000 hours (ISO 9227 standard).